How to Build a Safe and Efficient Biosafety Laboratory – Nanjing Expansion Technology

In the modern fields of scientific research and healthcare, biosafety laboratories play a critical role as essential facilities that safeguard human health and drive scientific advancement. Also known as biosafety containment laboratories, these facilities are designed—with protective barriers and rigorous management protocols—to prevent or control hazards posed by harmful biological agents, thereby meeting stringent biosafety standards. Biosafety laboratories are widely utilized across various sectors, including medicine, research, education, and agriculture. In the medical field, they serve as vital hubs for clinical diagnostics, disease surveillance, and vaccine development, providing robust support for early diagnosis and treatment of illnesses. In research, they offer scientists a secure environment to conduct cutting-edge biological studies, fostering innovation and progress in biotechnology. Meanwhile, in education, these laboratories are key training grounds for cultivating highly skilled bioscience professionals, equipping students with hands-on experience and research expertise. And in agriculture, biosafety labs are indispensable for monitoring and controlling animal and plant diseases, ensuring the safety and sustainable growth of agricultural production.
 

Grading and Classification: Precisely Identifying Security Needs

(1) Grading Criteria

Biosafety laboratories are classified into four levels—ranging from Level 1 to Level 4—based on the biological hazard level of the materials handled and the protective measures implemented. The protection level increases progressively with each higher level. A Level 1 biosafety laboratory (BSL-1) has the lowest protection standard and is suitable for experiments involving materials that pose minimal risks to humans, animals, plants, or the environment—specifically, those that do not contain pathogens capable of causing disease in healthy adults or livestock and crops. Examples include typical teaching laboratories used for cultivating non-pathogenic microorganisms, such as baker's yeast. These laboratories feature relatively simple layouts and structures, equipped primarily with basic facilities like standard lab benches and sinks. Personnel working in these labs typically wear ordinary lab coats, along with protective gloves and goggles, which adequately meet their safety needs. Laboratory procedures follow routine aseptic techniques, and experimental waste requires only basic sorting and disposal.

A Biosafety Level 2 (BSL-2) laboratory is suitable for experiments involving pathogens that pose moderate hazards or potential risks to humans, animals, plants, or the environment—pathogens that typically do not cause severe harm to healthy adults, animals, or the environment, but for which effective prevention and treatment measures are available. Examples include research on common influenza viruses. In terms of facility requirements, in addition to standard laboratory equipment, the lab must be equipped with a biosafety cabinet to handle procedures that may generate aerosols. The laboratory door should close automatically, and the ventilation system must ensure unidirectional airflow to minimize microbial spread. Personnel are required to wear protective gear such as isolation gowns, gloves, and goggles, while all experimental procedures must follow strict disinfection and sterilization protocols. Additionally, waste disposal practices must prevent secondary contamination.

A Biosafety Level 3 (BSL-3) laboratory is designed to handle pathogenic agents that pose a high risk to humans, animals, plants, or the environment—agents capable of causing severe or even fatal diseases through direct contact or airborne transmission. Fortunately, effective prevention and treatment measures are usually available, such as research on Mycobacterium tuberculosis. The facility’s architectural design must meet extremely stringent requirements: it must feature a dedicated ventilation system with separate supply and exhaust pathways, maintaining negative pressure inside the lab to ensure airflow consistently moves from cleaner areas toward contaminated zones. Additionally, an advanced air filtration system is essential for purifying outgoing air before it’s released into the environment. Beyond standard biosafety cabinets, BSL-3 labs are equipped with specialized protective gear, including heavy-duty gloves and positive-pressure protective suits, to minimize exposure risks. All experimental procedures adhere to rigorous aseptic techniques, while waste materials undergo meticulous sorting and disposal protocols. Finally, the lab must have comprehensive emergency preparedness plans in place to address potential biosecurity incidents, fires, chemical spills, or other unforeseen emergencies.

A Biosafety Level 4 (BSL-4) laboratory is the highest containment facility, designed for handling pathogens that pose an extreme risk to humans, animals, plants, or the environment—particularly those that can be transmitted via aerosols, have unknown modes of transmission, or involve highly dangerous, novel, and previously unidentified infectious agents for which no effective prevention or treatment measures currently exist. Examples include research on pathogens like the Ebola virus. The lab features double doors or airlock chambers, requiring personnel to pass through sealed transition areas before entering—and a dedicated air shower room when exiting. All incoming and outgoing air undergoes multi-stage filtration to ensure that even exhaust air is completely safe. Additionally, the facility is equipped with a high-pressure sterilizer featuring dual doors, enabling secure disposal of hazardous waste. Researchers wear fully enclosed, positive-pressure protective suits to provide comprehensive protection against any potential microbial exposure.

(II) Classification Method

Classified by containment levels—ranging from Biosafety Level 1 to Level 4 laboratories as mentioned above—this categorization clearly reflects the laboratory's ability to protect against biological agents of varying hazard levels, making it convenient to select the appropriate lab for research based on the risk level of the study subject.

Classified by the transmission routes of pathogenic biological agents according to operational procedures, biosafety laboratories are divided into Class A and Class B. Class A laboratories primarily handle biological agents that are not transmitted via airborne routes—for example, enteric pathogen research labs where bacteria mainly spread through the fecal-oral route. Protective measures here focus on preventing contact infections and avoiding contamination of food and water sources. During operations, strict protocols must be followed to manage personnel behavior and effectively control potential contamination risks. In contrast, Class B biosafety laboratories are designed for handling biological agents that can be transmitted through the air. Among these, Class B1 laboratories can effectively utilize safety containment devices, such as high-efficiency biosafety cabinets, to control the airborne dissemination of microbial aerosols. Proper placement and correct usage of biosafety cabinets are crucial in this context. On the other hand, Class B2 laboratories cannot rely on safety containment devices for effective operation; instead, they require enhanced filtration systems in the ventilation network along with robust negative-pressure control. Additionally, these labs demand even higher standards of overall containment to prevent any possible microbial leakage.

Classified by their research focus, biosecurity laboratories can be divided into general biosafety laboratories and experimental vertebrate biosafety laboratories. General biosafety laboratories do not involve experiments with vertebrates or insects; instead, they are primarily used for disciplines such as microbiology and cell biology—researching topics like bacterial gene expression regulation mechanisms, viral replication cycles, and cellular physiological functions. The design and operation of these labs emphasize handling microorganisms and cells appropriately, maintaining optimal temperature, humidity, and a sterile environment. On the other hand, experimental vertebrate biosafety laboratories use vertebrate animals in research activities, such as employing animal models to study infectious disease pathogenesis or evaluate drug efficacy. In addition to addressing the risks posed by microorganisms to researchers and the surrounding environment, these labs also prioritize protecting the experimental animals themselves—and carefully consider how pathogens carried by the animals might affect the researchers.
 

Key focus areas: Building a safe and efficient space

(1) Core Design Principles

The principle of risk-based adaptation is the foundation for constructing biosafety laboratories. Different levels of biosafety laboratories correspond to operations involving biological agents of varying risk levels. For instance, a BSL-1 laboratory handles low-risk biological agents, and its design and protective measures are relatively straightforward. In contrast, a BSL-4 laboratory deals with highly pathogenic agents whose transmission routes are unknown and for which no effective prevention or treatment methods exist—thus requiring state-of-the-art containment facilities and meticulously stringent operational protocols. Only when the laboratory level is strictly aligned with the risks posed by the microorganisms being handled can we avoid "over-engineering," which leads to unnecessary resource waste, or "under-protection," which could create serious safety hazards.

The principle of zone isolation divides the laboratory into clean, semi-contaminated, and contaminated zones through rational area planning and the installation of physical barriers. The clean zone is primarily used for office work and rest, where personnel are protected from biological agent contamination. The semi-contaminated zone serves as a transition area connecting the clean zone to the contaminated zone, helping to minimize the risk of cross-contamination. Meanwhile, the contaminated zone is the core area for conducting biological experiments, where all operations that may pose biohazard risks are carried out. Each zone is physically separated by walls, doors, and other barriers, and a pressure gradient is utilized to ensure airflow moves from the clean zone, through the semi-contaminated zone, and finally into the contaminated zone—preventing harmful biological agents from spreading in reverse.

The principle of unidirectional flow strictly regulates the movement of personnel, materials, samples, air, wastewater, and more. Taking the flow of personnel as an example: when entering the laboratory, individuals must first pass through designated areas such as changing rooms and buffer zones before accessing the contaminated area for experimental work. Upon exiting, they follow the reverse sequence—first through the buffer zone, then showering and changing clothes—to ensure that no contamination is carried out of the lab. Materials are introduced via a double-door transfer window, with a strict prohibition on retracing their original path to prevent secondary contamination. Meanwhile, air flows unidirectionally from the clean zone toward the contaminated area, while wastewater is collected and treated through dedicated pipelines, effectively preventing the spread of contamination.

The principle of redundancy provides multiple layers of safety for critical laboratory systems. For instance, the ventilation system is equipped with a backup fan that automatically activates in case the primary fan fails, maintaining the lab’s negative pressure and ensuring continuous air circulation—thus preventing the leakage of hazardous biological agents. Meanwhile, the disinfection system employs a combination of advanced methods: surface disinfection is achieved through chemical wipes paired with UV irradiation, while air disinfection relies on high-efficiency air filtration and recirculated air treated with UV light. These measures collectively enhance sterilization effectiveness and significantly reduce the risk of biological contamination. Additionally, the power supply system features dual power circuits and includes an Uninterruptible Power Supply (UPS), guaranteeing that essential equipment such as biosafety cabinets and refrigerators can continue operating smoothly—even during unexpected city-wide power outages—thereby safeguarding both the continuity and security of experimental activities.

(II) Key Technology Systems

1. Floor Plan Design

Biosafety Level 1 and Level 2 laboratories have relatively flexible requirements for their floor plans, allowing for open layouts. These labs can separate contaminated areas from the outside world using simple partitions, while also incorporating buffer zones. For example, basic biology teaching laboratories in universities often feature more open layouts, making it easier for students to perform experiments and observe processes—yet they still maintain essential isolation through buffer zones, ensuring that the external environment remains free from laboratory contamination.

The Biosafety Level 3 laboratory follows a "Three Zones and Two Buffer Rooms" layout, comprising a clean zone, a semi-contaminated zone, a contaminated zone, plus two buffer rooms. The clean zone is designated for office work and rest areas, kept isolated from the external environment. The semi-contaminated zone serves as a transition area, seamlessly connecting the clean zone to the contaminated zone. Meanwhile, the contaminated zone is the core experimental area, equipped with critical facilities such as biosafety cabinets and autoclaves. The buffer rooms are outfitted with functions like changing clothes and handwashing stations, and some even feature air showers to further minimize contamination risks when personnel enter or exit. For instance, BSL-3 laboratories conducting infectious disease research effectively control the spread of pathogens during experiments by adhering rigorously to this "Three Zones and Two Buffer Rooms" layout.

The layout of a Biosafety Level 4 laboratory is more complex, divided into a main laboratory and an auxiliary area. The main laboratory features either a fully enclosed isolation chamber design or a positive-pressure protective suit operation zone, while the auxiliary area includes facilities such as changing rooms, showers, and equipment disinfection areas. These two zones are connected via air-tight doors and transfer hatches. Personnel entering the main laboratory must wear positive-pressure protective suits with independent air supply systems, ensuring complete isolation between lab staff and the external environment. For instance, BSL-4 laboratories dedicated to Ebola virus research employ a fully sealed design and stringent protective measures, effectively preventing the accidental release of highly pathogenic viruses.

2. Ventilation, Air Conditioning, and Negative Pressure Control System

The ventilation system plays a critical role in biosafety laboratories, with its core objectives being to achieve directional airflow, maintain stable negative pressure, and ensure efficient filtration to prevent the spread of contamination. In terms of pressure gradients, the setup follows the principle of Clean Area > Semi-contaminated Area > Contaminated Area, and laboratories at different levels have specific differential pressure requirements. For BSL-2 laboratories, the pressure difference must be ≥5 Pa to guarantee basic airflow direction; for BSL-3 labs, the requirement is stricter, with a minimum pressure difference of ≥10 Pa to tightly control air movement; and for BSL-4 facilities, the stringent standard mandates a pressure difference of ≥15 Pa to meet the highest-level protection needs. By precisely managing the difference between supply and exhaust air volumes, the system maintains a stable pressure gradient, ensuring that air always flows from cleaner areas toward more contaminated ones.

In terms of airflow management, contaminated areas typically employ an "supply from above, exhaust from below" approach. Supply vents are installed at the room's ceiling, while exhaust vents are positioned at the floor level, creating a downward airflow that eliminates air circulation dead zones and ensures pollutants are efficiently removed. Additionally, the exhaust system of biological safety cabinets must be properly coordinated with the room's ventilation system to prevent airflow interference, thereby maintaining a stable negative pressure environment inside the cabinet and effectively safeguarding both laboratory personnel and experimental samples.

The filtration requirements are also extremely stringent: incoming air undergoes a three-stage filtration process using primary, secondary, and high-efficiency (HEPA) filters. The primary filter captures large particulate dust, while the secondary filter further removes smaller particles. The HEPA filter boasts an efficiency of over 99.97% in trapping particles sized 0.3 μm and larger, ensuring that the air entering the laboratory remains impeccably clean. Similarly, exhaust air must also pass through HEPA filtration—specifically, BSL-3 and BSL-4 laboratories require double HEPA filtration for their exhaust systems. Additionally, the integrity of these filters is regularly monitored, and any damaged filters are promptly replaced to guarantee that the discharged air contains no residual active microorganisms, thereby preventing environmental contamination.

3. Barrier Protection System

Physical barriers are primarily constructed through walls, floors, doors and windows, as well as specialized transfer systems. Walls and floors should be made from corrosion-resistant, easily disinfectable materials such as epoxy resin or stainless steel. These materials are seamlessly connected to minimize gaps where microorganisms could breed or linger, while also being highly resistant to chemical disinfectants, making daily cleaning and sterilization straightforward. For doors and windows, the doors in contaminated areas are designed as air-tight models that effectively seal when closed, preventing any air leakage. Windows, meanwhile, are fixed and tightly sealed to avoid any exchange of air between the external environment and the laboratory interior. As for transfer systems, double-door pass-through windows are used to facilitate the movement of items between different zones while simultaneously blocking air circulation. In BSL-4 laboratories, steam-sterilization pass-through chambers are employed to thoroughly sterilize all transferred items, ensuring that no biological contaminants are inadvertently spread.

Biological barriers primarily include biosafety cabinets and personal protective equipment. Biosafety cabinets are critical devices for preventing biological hazards, categorized into different types based on their protection levels and operational needs—labs at BSL-2 level and above are required to equip such cabinets. A Class I biosafety cabinet provides only basic ventilation and filtration functions; a Class II cabinet effectively safeguards personnel, samples, and the environment, making it suitable for a wide range of biological experiments. In contrast, a Class III biosafety cabinet features a fully enclosed design, offering the highest level of protection and is used specifically for handling highly pathogenic bioagents. Personal protective equipment varies depending on the laboratory’s biosafety level: In BSL-1 labs, operators wear white lab coats and gloves for basic protection; in BSL-3 labs, personnel must don impermeable protective suits and N95 masks to prevent infection from airborne pathogens. Meanwhile, in BSL-4 labs, operators are required to wear positive-pressure protective suits that completely isolate them from the external environment, with a dedicated air supply system ensuring a continuous flow of clean, uncontaminated air for absolute safety.

4. Disinfection and Waste Management System

In terms of surface disinfection, the walls and equipment surfaces in contaminated areas must be wiped down daily with chlorine-containing disinfectants or peracetic acid, which are effective at eliminating common bacteria, viruses, and other microorganisms. Additionally, pass-through windows and biosafety cabinets can be equipped with built-in UV or hydrogen peroxide fogging systems, enabling disinfection before and after transferring materials or conducting experiments, thereby ensuring that surfaces remain free from biological contamination.

In addition to relying on high-efficiency filters in the ventilation system, BSL-2 and BSL-3 laboratories can also be equipped with recirculating UV air disinfectors, which use ultraviolet light to inactivate airborne microorganisms, further reducing the risk of airborne contamination.

Waste management is divided into solid waste disposal and wastewater treatment. Solid waste is first sterilized using high-pressure steam at 121°C and 103.4 kPa for 15 to 30 minutes, effectively eliminating any microorganisms present. Afterward, it is handled according to medical waste protocols and entrusted to a specialized institution for harmless treatment. As for wastewater treatment, BSL-3 and BSL-4 laboratories must have dedicated pipeline systems to collect their wastewater, which is then treated using methods such as "ultraviolet + chemical disinfection" or "thermal sterilization." These processes ensure that the treated wastewater meets the "Discharge Standard of Water Pollutants from Medical Institutions" (GB 18466) before being released, thereby preventing pathogen-containing wastewater from contaminating the environment.

5. Emergency Support System

The power supply system features a dual-circuit configuration and is equipped with an Uninterruptible Power Supply (UPS). In the event of a failure in one of the mains power sources, the dual-circuit system automatically switches to the other, ensuring continuous power to the laboratory. Meanwhile, the UPS provides backup power to critical equipment—such as the ventilation system, biosafety cabinets, refrigerators, and more—for a limited time when both mains supplies fail entirely. This ensures that essential devices keep operating, preventing potential biosecurity incidents. For instance, it safeguards against situations where biological samples stored in refrigerators could degrade due to temperature spikes caused by power outages, or where the loss of ventilation functionality might lead to uncontrolled negative pressure conditions in the lab.

The emergency exhaust system automatically activates the backup fan in case of a ventilation system failure, maintaining negative pressure in the laboratory for at least 30 minutes. This provides critical time for personnel evacuation and troubleshooting, while preventing harmful biological agents from leaking into the external environment.

Emergency flushing facilities include emergency showers and eyewash stations, installed within the contamination zone and positioned no more than 3 meters from the operational area. This ensures that laboratory personnel can quickly rinse off in case of biological contamination, minimizing potential harm. Additionally, BSL-3 and BSL-4 laboratories must be equipped with a separate emergency decontamination corridor, allowing staff to undergo full-body disinfection and change clothes in an emergency—thus ensuring their safe exit from the lab.

 

Construction Process: Scientific, Rigorous, and Safety-First

The construction of a biosafety laboratory is a systematic project, where every step plays a critical role and requires adherence to rigorous procedures to ensure the lab's safety and reliability. From the initial risk assessment to the final administrative acceptance, each stage carries the vital responsibility of safeguarding biosecurity.

(1) Preliminary Risk Assessment

The preliminary risk assessment is the first and most critical step in the construction of a biosafety laboratory—its importance goes without saying. During this process, an evaluation team composed of experts from diverse fields such as microbiology and engineering conducts a comprehensive and meticulous analysis of the types, quantities, and transmission routes of microorganisms that will be handled in the lab. They must gain a deep understanding of each microorganism’s unique characteristics, carefully assessing the potential risks it poses to humans, animals, plants, or the environment. For instance, if the lab plans to study a novel virus, experts will thoroughly examine its genetic sequence, pathogenic mechanisms, and modes of transmission—factors crucial for determining the appropriate containment level required for the facility. Based on these assessment findings, the lab’s biosafety level and core protective requirements are precisely defined, providing a solid scientific foundation for subsequent design and construction. This rigorous risk assessment not only helps prevent biosecurity incidents caused by inadequate protection but also ensures that resources are not wasted due to over-engineering.

(II) Professional Design

Professional design is a critical phase in the construction of biosafety laboratories, directly influencing both the safety and functionality of the facility. After completing the preliminary risk assessment, the construction entity will commission a qualified design firm with expertise in biosafety engineering to carry out the project. These design firms will meticulously plan the laboratory's layout, ventilation and air-conditioning systems, barrier protection measures, and disinfection protocols—integrating relevant standards such as the "Technical Code for Biosafety Laboratory Buildings" (GB 50346) and the "General Requirements for Laboratory Biosafety" (GB 19489)—while aligning closely with the findings from the risk assessment. In terms of layout design, strict adherence to zoning separation and unidirectional flow principles ensures that clean zones, semi-contaminated zones, and contaminated zones are appropriately delineated, guaranteeing safe and orderly movement of personnel, materials, and samples. Meanwhile, the ventilation and air-conditioning system design places particular emphasis on verifying the appropriateness of pressure gradients and airflow patterns, ensuring that the lab achieves controlled airflow, stable negative pressure, and efficient filtration—effectively preventing the spread of contaminants. Additionally, the design team will develop a comprehensive disinfection plan, equipping the lab with robust sterilization capabilities to promptly eliminate any potential pathogens. Throughout the design process, experts will be convened multiple times to rigorously review and refine the proposed solutions, ensuring that the final design is both scientifically sound and operationally practical.

(III) Construction and Material Management

Construction and material control are crucial safeguards for ensuring the quality of biosafety laboratory construction. During the construction phase, the contractor strictly follows the design drawings and selects materials that meet standardized criteria, ensuring that all laboratory facilities comply with biosafety requirements. When choosing wall and floor materials, corrosion-resistant and easily disinfectable options are employed, such as epoxy resin or stainless steel—materials that can withstand the corrosive effects of chemical disinfectants and feature seamless connections, minimizing gaps where microorganisms might breed or linger. For doors and windows, air-tight doors are installed in contaminated areas to guarantee effective sealing when closed, preventing air leakage; meanwhile, windows are fixed and tightly sealed to block any exchange between indoor and outdoor air. Throughout the construction process, meticulous attention is paid to maintaining high-quality workmanship, with enhanced training and management of construction personnel to ensure compliance with industry standards. Additionally, key systems like ventilation and electrical systems are installed by specialized technicians to guarantee their proper functionality. Finally,施工现场的管理 is rigorously strengthened to keep the site clean and organized, thereby preventing dust and debris generated during construction from contaminating the laboratory environment.

(4) Third-party Testing

Third-party testing is a critical step in the construction process of biosafety laboratories, objectively and impartially verifying whether the lab's construction quality meets safety standards. After construction is completed, the project owner will commission a qualified third-party organization to conduct a comprehensive inspection of the laboratory. The third-party agency will rigorously evaluate key parameters—such as pressure gradients, HEPA filter integrity, airflow direction, and disinfection effectiveness—based on relevant standards and regulations. During pressure gradient testing, specialized pressure-measuring equipment will be used to assess the differential pressure between the clean zone, semi-contaminated zone, and contaminated zone, ensuring that these pressure differences comply with the specific requirements of each laboratory level. Meanwhile, when evaluating HEPA filter integrity, advanced detection methods like aerosol photometry will be employed to identify any potential leaks, confirming that the filters achieve the required filtration efficiency. Through this independent third-party assessment, any issues or potential risks in the lab's construction can be identified promptly, providing a solid foundation for subsequent corrective actions and improvements—and ultimately ensuring that the laboratory fully complies with biosafety standards before it begins operation.

(5) Administrative Acceptance

Administrative acceptance is the final checkpoint in the construction of a biosafety laboratory. Only after passing this administrative review can the lab officially begin operations. The construction entity will apply for acceptance to the local health commission or disease control center, submitting relevant documents such as design files, test reports, and emergency response plans. The acceptance authority will then assemble a team of experts to conduct on-site inspections and thorough reviews of the laboratory. These evaluations cover various aspects, including the lab’s facilities and equipment, safety protection measures, and management protocols. Experts will meticulously verify whether the lab’s ventilation system is functioning properly, ensure that biosafety cabinets meet regulatory standards, and confirm that personal protective equipment is fully equipped. Additionally, they’ll assess the feasibility and effectiveness of the emergency response plan, guaranteeing that the lab can respond swiftly and efficiently should a biosafety incident occur. Only upon successful completion of the administrative acceptance and receipt of the "Biosafety Laboratory Certificate" can the laboratory officially start its operations and carry out related experimental activities.

 

Future Outlook: Continuously Enhancing Biosecurity Capabilities

The construction and development of biosafety laboratories are critical measures for humanity to address biological threats and safeguard life and health. From infectious disease prevention and control to biotechnology research and innovation, biosafety labs have consistently remained at the forefront, playing an irreplaceable role.

Looking ahead, technological innovation will become the core driving force behind the development of biosafety laboratories. As emerging technologies such as artificial intelligence, the Internet of Things, and big data continue to advance, biosafety labs will undergo a transformative shift toward intelligent and automated operations. Smart monitoring systems will enable real-time detection of laboratory environmental parameters, equipment status, and personnel activities, delivering precise risk alerts and facilitating rapid responses to biosecurity threats. Meanwhile, automated experimental equipment will enhance both efficiency and accuracy while minimizing human-induced safety risks. Additionally, innovative protective materials and technologies will continually emerge, providing an even stronger foundation for safeguarding lab environments.

The improvement of regulations and standards is a crucial safeguard for the continuous development of biosafety laboratories. As biotechnology rapidly advances and the biosafety landscape evolves constantly, existing regulations and standards must be continually updated and refined to address emerging risks, challenges, and technological demands. Moving forward, these regulations and standards will place greater emphasis on the scientific rigor of risk assessments, the effectiveness of protective measures, and the standardization of operational procedures, providing more stringent and comprehensive guidance for the construction, operation, and management of biosafety laboratories.

The importance of international cooperation in the field of biosafety is also becoming increasingly prominent. Biosafety issues pose a global challenge that requires countries to join forces and work together to address them effectively. Looking ahead, international collaboration on biosafety will grow even closer, encompassing areas such as information sharing, technology exchange, and joint research. Countries will collaborate to establish global biosafety standards and guidelines, strengthen monitoring and prevention of transnational biosecurity risks, and collectively safeguard global biosafety.

Continuously enhancing biosecurity capabilities is an inevitable requirement for the future development of biosafety laboratories. We should actively embrace technological innovation, steadily refine our regulatory and standards frameworks, and strengthen international cooperation and exchanges—working together to build a safer, more reliable biosecurity protection network that safeguards human health and safety.